Method of making watch centers



Oct. 15, 1929. I R 'J sc w z 1,732,196

METHOD CF MAKING WATCH CENTERS Filed Dec. 51, 1928 Ema. 112E51 ||||||||i||| @JIIIIIIIIHIH Emil- Patented Oct. 15 1929 UNITED STATES RUDOLPH J. SCHWARZ, OF PROVIDENCE, RHODE ISLAND, ASSIGN'OR TO AMERICAN PATENT oFHcE STANDARD WATCHCASE COMPANY, OF PROVIDENCE, RHODE ISLAND METHOD OF MIAKING WATCH CENTERS Application filed December 31, 1928. Serial No. 329,594.

This invention relates to method of making watch centers and the primary object thereof is to provide a method of making watch centers wherein same are integral with the hollow or tubular bearing through which the winding arbor extends, thereby not only providing a stronger structure but also one which dispenses with the usual custom of soldering the bearing onto the center.

The invention further aims to provide a method which can be easily, and quickly and economically practiced.

In the drawings,

Figure 1 is a plan View of the blank;

Figure 2 is an end elevation thereof Figure 3 is a plan View of the blank in the second stage of the method;

Figure 4 is an end elevation of Figure 3,

Figure 5 is a plan view of the complete center;

Figure 6 is an end view of Figure 5 and Figure 7 is an enlarged section on line 7 7 of Figure 5.

In proceeding in accordance with the present invention a blank 1, as shown in Figures 1 and 2 is employed, and which has an open center and a'boss 2, integral therewith and extending radially from the periphery of Y the blank. The boss is formed with a prick punch 3 which latter is located to one side of the center of the boss, as shown in Figure 2. The boss as shown in Figures 3 and 4, is next turned down into cylindrical form, and has a hole 4 drilled therethrough at the point of the prick punch, the blank being also partially trimmed so as to have its surfaces and edges smooth and polished. The final step of the method resides in forming a circular channel 5 on the boss intermediate'its ends, and in forming the bezel-receiving channel 6 in a face of the blank and the slit 7. This slit is for the purpose of receiving a knife or other sharp instrument so as to enable the center to be engaged and moved out of the case, the latter not shown.

It should be distinctly understood that the according to the nature of the bezel, which latter in some instances have bracelet or strap engaging or holding loops or other means.

From the foregoing it will be seen that the boss which forms the winding arbor bearing is integral with the center and provides a stronger and more durable structure, which is of increased anchorage as compared to soldered bearings as usual in the art.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. The herein described method of making watch centers which resides in providing a blank having the general shape of the center and. which has an integral boss extending radially from the periphery thereof, then in drilling the boss and in turning the exterior thereof to provide a tubular cylindrical hearing for the winding stem or arbor, and informing a circular groove on the periphery of the boss between its ends, and finally in shaping the blank into final form and in providing same with bezel receiving means.

2. The herein described method of making watch centers which resides in providing a blank having an integral boss, then in partially shaping the blank and in forming the boss into tubular cylindrical shape to form a winding arbor bearing and finally in finishing the blank and providing same with bezel engaging means.

3. The herein described method of making watch centers which resides in providing a blank having an integral boss, then in forming the boss to provide a tubular winding arbor bearing, and finally in finishing the blank and in providing same with bezel engaging means.

In testimony whereof I have hereunto signed my name.

RUDOLPI-I J. SCI-IWVARZ. 

